<PackageReference Include="NUnit" Version="4.3.2" />

NUnit.Framework.Constraints.FileOrDirectoryExistsConstraint

FileOrDirectoryExistsConstraint is used to determine if a file or directory exists
namespace NUnit.Framework.Constraints { public class FileOrDirectoryExistsConstraint : Constraint { public FileOrDirectoryExistsConstraint IgnoreDirectories { get; } public FileOrDirectoryExistsConstraint IgnoreFiles { get; } public FileOrDirectoryExistsConstraint(); public FileOrDirectoryExistsConstraint(bool ignoreDirectories); } }